Particle Acceleration and Emission Processes in Mrk 421
文献类型：期刊论文
| 作者 | Cao G(曹刚) ; Wang JC(王建成)
|
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2013-10-25 |
| 卷号 | 65期号:5 |
| 关键词 | acceleration of particles galaxies: BL Lacertae objects: individual: Mrk 421 galaxies: jets gamma-rays: theory radiation mechanism: non-thermal |
| ISSN号 | 0004-6264 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Cao, G (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | We investigated the X-ray and gamma-ray flares of Mrk 421 on 2008 June 6-15 using the synchrotron self-Compton-(SSC) model with electron acceleration, in which an evident correlation between the X-ray and gamma-ray bands appears, while no significant correlation between the optical and X-ray band was observed. We argue that the emission from Mrk 421 may originate from two different components. One is a steady component from the outer region, which is mainly attributed to the optical band, in which the electrons are accelerated by first-order Fermi acceleration mechanism. We used a steady electron spectrum to produce the SSC emission. The other is a variable component from the inner region, in which the electrons are accelerated by a stochastic acceleration process. We used the time-dependent SSC model to produce the emission from the variable component. We suggest that the flares are due to a hardening of the electron spectrum under the process of stochastic acceleration, which leads to a hardening of the observed spectrum in the X-ray and gamma-ray bands. Furthermore, we find that the energy densities of electrons and magnetic fields are at near equipartition in both jet regions. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SELF-COMPTON MODEL ; GAMMA-RAY ; MULTIWAVELENGTH OBSERVATIONS ; BLAZAR JETS ; X-RAY ; STOCHASTIC ACCELERATION ; CORRELATED VARIABILITY ; SPECTRAL VARIABILITY ; RELATIVISTIC JET ; PROTON BLAZAR |
| 收录类别 | SCI |
| 原文出处 | http://pasj.oxfordjournals.org/content/65/5/109 |
| 语种 | 英语 |
| WOS记录号 | WOS:000328300300018 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5028]  |
| 专题 | 云南天文台_高能天体物理研究组 |
| 作者单位 | National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Cao G,Wang JC. Particle Acceleration and Emission Processes in Mrk 421[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2013,65(5). |
| APA | Cao G,&Wang JC.(2013).Particle Acceleration and Emission Processes in Mrk 421.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,65(5). |
| MLA | Cao G,et al."Particle Acceleration and Emission Processes in Mrk 421".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 65.5(2013). |
入库方式： OAI收割
来源：云南天文台
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